Most adults spend about _____ of their time in REM sleep,whereas infants spend about ____ of their time in REM.

A) one-fifth; half
B) half; one-fifth
C) half; half
D) one-third; half

REM Sleep

A phase of sleep characterized by rapid eye movements, vivid dreams, and increased brain activity.

Infants

Very young children, typically under one year old, in the earliest stages of development.

Adults

Individuals who have reached the age where they are considered legally responsible for their actions and capable of living independently.